벼에서 흑다리긴노린재 [Paromius exiguus (Distant)] (Hemiptera: Lygaeidae) 산란모델 및 생명표

Temperature-dependent oviposition model and life table parameters of Paromius exiguus (Distant), the causal agent of ‘pecky’ rice grain were examined at eight constant temperatures (17.5, 20, 22.5, 25, 27.5, 30, 32.5, and 35±°C) and a photoperiod of 14:10 (L:D) h. Unit functions of the oviposition model were developed and life table parameters were estimated. The longevity of P. exiguus adults decreased with increasing temperature (123.8 days at 17.5°C and 23.6 days at 32.5°C). Total fecundity was highest at 30°C (585.2 eggs/female) and lowest at 17.5°C (21.5 eggs/female). In order to develop a temperature-dependent oviposition model, adult aging-rate, temperature-dependent fecundity, age-specific survival rate, and age-specific cumulative oviposition rate equations were estimated. All unit equations (r2 = 0.92~0.98) except for the temperature-dependent fecundity equation (r2 = 0.83~0.85), described oviposition characteristics of P. exiguus adequately. Life table parameters of P. exiguus were estimated at various constant temperatures. Net reproduction rate (R0) was highest at 30°C (118.21). Mean generation time (T) was shortest at 32.5°C (32.99 days) and doubling time (Dt) was shortest at 30°C (5.69 days). The highest values of intrinsic rate of increase (rm) and finite rate of increase (λ) were 0.122 and 1.129 at 30°C, respectively.